prionace glauca การใช้

The bigeye thresher appears to be an ecological competitor of the blue shark ( " Prionace glauca " ), and the numbers of the two species are negatively correlated such as that only one of two occurs in any given location.
Based on allozyme data, Naylor ( 1992 ) reaffirmed the integrity of this group, with the additions of the silky shark ( " C . falciformis " ) and the blue shark ( " Prionace glauca " ).
This family consists of mostly slender but powerful mid-to large-sized sharks and includes some other well-known sharks, such as the blue shark ( " Prionace glauca " ), lemon shark ( " Negaprion brevirostris " ), and bull shark ( " Carcharhinus leucas " ).
A phylogenetic analysis based on allozyme data, published by Gavin Naylor in 1992, indicated that the Caribbean reef shark is the sister taxon to a clade formed by the Galapagos shark ( " C . galapagensis " ), dusky shark ( " C . obscurus " ), oceanic whitetip shark ( " C . longimanus " ), and the blue shark ( " Prionace glauca " ).
Based on analyses of observer data collected from 2005 to 2009, 22 shark species were observed captured in the Marshall Islands longline tuna fishery, with 80 % of the shark catch representing five species : blue shark ( " Prionace glauca " ), silky shark ( " Carcharhinus falciformis " ), bigeye thresher shark ( " Alopias superciliosus " ), pelagic thresher shark ( " A . pelagicus " ) and oceanic whitetip shark ( " Carcharhinus longimanus " ) ( Bromhead et al ., 2012 ).